Pipe-wrench



(No Model.)

' D. R. PORTER.

PIPE WRENCH.

No. 889,899. Patented Sept. 25, 1888.

N. PETERS. Phnlo-Ullwgnphbr, Waihinginru ILC.

DNTTED STATES ATENT Trice.

DANIEL It. PORTER, OF CHELSEA, MASSACHUSETTS.

PIPE-WRENCH.-

SPECIPICATION forming part of Letters Patent No. 389,899, datedSeptember 25, 1888.

Application filed September}, 1887. Serial No. 249,108. (No model.)

To aZZ whom it may concern.-

Be it known that I, DANIEL R. PORTER, a citizen of the United States,residing at Chelsea, in the county of Suffolk and State ofMassachusetts, have invented a new and useful Improvement inPipe-Wrenches, of which the following is a specification.

My invention relates to that class of pipe wrenches that are providedwith a sliding jaw; and it consists in certain details of construction,hereinafter fully described, and pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a side view of apipe-wrench embodying my invention. Fig. 2 is a longitudinal sectionthrough the center of the wrench. Fig. 3 is a cross-section taken online as w of Fig. 2.

Arepresents a shank, provided at its outer end with a fixed jaw, B, andat its other end provided with a handle, 0.

D is a movable jaw, provided with an extension, D, the end of which isturned up to form a pawl, d, that fits into the ratchet-teeth a, cut onthe under side of the shank A. The movable jaw D is connected to theshank A by means of a U or saddle shaped piece shown as comprising twoloops, E F, each of which is rigidly secured to the movable jaw byrivets e g. The jaw D is provided near its fore end with a recess, G, inwhich a spring, H, is placed so that one end will bear against the underside of the shank A. The loop F is provided on its upper end with aprojection,

05 f, in which a recess, I, is formed, and a spring, J, is placedtherein, so as to bear upon the top of the shank A, as shown, so that bydepressing the projection f the pawl d is thrown out of contact with theteeth a, and is free to be moved forward or drawn back, the spring Jsliding on the top of the shank A, while the spring H slides on theunder side of the shank.

Vhen using the wrench, the projection f is depressed and the jaw D drawnback. The jaws are then passed over the pipe and the jaw D pushedforward by pressing on the projection f until both jaws are in contactwith the pipe, the spring J allowing the pawl d to ride over the teetha. When the jaws are thus adjusted and the wrench turned in the properdirection, the tendency will be to force the jaw D toward the shank A,thereby firmly gripping the pipe, the spring H allowing the jaw D to bethus pressed inward, while the pawl d acts as a fulcrum, as well aspreventing the jaw being forced backward. When it is desired to releasethe hold upon the pipe, all that has to be done is to turn the wrench inthe opposite direction, and the expansive action of the spring H throwsthe oscillating jaw D outward, the teeth on the face of the jaw D beingcut in reverse direction to those in the jaw B, so that they will griponly when the wrench is turned one way.

\Vhat I claim as my invention is- 1. The combination of a wrenchshankprovided with ratchet-teeth on its inner side, a jaw fixed on said shankand having inwardlyinclined serrations, a sliding jaw havingoutwardly-inclined serrations, and provided with an elongated rearwardextension having a pawl at its inner end for engaging the teeth on theshank, a saddle embracing said shank and fixed to said movable jaw nearits opposite ends, said saddle being considerably larger than saidshank, whereby the sliding jaw has lateral play thereon, a springinterposed between the outer end of the sliding jaw and theinner side ofsaid shank, and a spring interposed between the inner end of the saddleand the outer side of said shank opposite the inner end of theslidingjaw, substantially as described.

2. The combination of a wrench-shank provided with ratchet-teeth on itsunder side, a jaw fixed on said shank and having inwardly inclinedserrations, a sliding jaw having outwardly-inclined serrations andprovided with an elongated rearward extension having a pawl at its innerend for engaging the teeth on the shank, loops or saddles embracingsaidshank and fixed to said movable jaw near its opposite ends, said loopsbeing considerably larger than said shank, whereby the sliding 5 IOO111,11 socket on the upper side of the inner In testimony whereofI havesigned inyname 100p, and a spring in said socket and bearing to thisspecification in the presence of two snbon the upper side of said shankfor drawing scribing Witnesses.

the inner end of the rearward extension of the DANIEL PORTEI. 5 slidingjaw toward the shank to cause the Witnesses:

pawl to engage the teeth thereof,substantially L. XV. HOW

as described. E. PLANTA.

